Toothbrush



FIG. 1 is a front perspective view from above and one side of the toothbrush showing a new design;

FIG. 2 is a longitudinal and elevational front view of a new design;

FIG. 3 is a longitudinal and elevational back view of a new design;

FIG. 4 is an elevational view of the other side view of a new design;

FIG. 5 is a plan view of a new design; and,

FIG. 6 is a underneath plan view of a new design. 

The ornamental design for a toothbrush, as shown and described. 